Process of manufacturing refractory material.



NITE STATES PATENT OFFICE.

' GEORGE-CANNANFLUDDER, GEORGE ERIC FLUDDER, AND ALBERT WILLIAM FLUDDEB,

' O'F *ALRESFORD, COLCHESTER, ENGLAND.

PROCESS OF MANUFACTURING REFRAGTORY MATERIAL.

Ho Drawing.

' of refractory material, such as bricks, blocks,

and other molded articles, and also of furnace linings, cements, and the like.

According to this invention we employ aluminium sulfate as a binder for refractory material such as quartz (or other form of silica such as flints, sand, gravel, ganister,

' sandstone and the like), bauxite and other suitable forms of alumina, magnesite and other suitable forms of magnesia, chrome ore and the like. We may according to this invention also mix with the silica or the like and the said binding agent a small quantity say from 1} to 10 per cent. according to circumstances of a ground magnesium sillcate such as talc or steatite which acts as an ag lomerant under the high temperature of t e kiln.

This invention may be carried out as follows: Silica in the form of ganister for example, is ground and graded to such sizes as circumstances require; it is then mixed in a heated mixer with a hot solution of aluminium sulfate and the whole thoroughly incorporated and brought to a proper state for molding. Bricks and such articles may be molded under mechanical pressure in a heated mold after which they are subjected to a drying heat to make them fit to handle; they are then set in a kiln and burned. Should the bricks contain a large percentage of Water they must be placed in a cool chamber, heat being applied very gradually. When a harder and stronger article is required magnesium silicate should be added. For this purpose the silicate, in the form of tale for example, is ground to a very fine powder and mlxed with the silica before the addition of. the aluminium sulfate solution or it may be suspended in the said solution before addition to the silica. Or ganister may be ground and tempered in a tempering pan where it is moistened with a solution of aluminium sulfate holding in suspension Specification of Letters Patent, I Patented NOV. 29,1910.

Application filed December 31, 1909. Serial No. 535,732.

magnesium silicate (previously ground to a very fine powder) and brought to a proper consistenc tion is only used as a blnding agent for an unbnrned article one er cent. compared with the mass to be boum of aluminium sulfate gives. ood results, when used as an agglomerant for articles burned to a high temperature a larger percentage say 2 or 3 per cent. should be added and where it is desired to incor orate alumina with the aggregate it is ad ed to the extent desired. Theuantity of ma esium. silicate it is desirab e to add depen s artly upon the chemical composition of t e raw material and partly upon the nature of the article it is desired to produce. The addition of 2 per cent. is

for molding. When the soluwhen the article is subjected to a. high temheated mixer with a hot solution of aluminium sulfate, or tem ered in a tempering pan mixed with the so ution of aluminium sulfate, and brought toa proper consistency for molding. Magnesite and the like may be similarly treated.

A good hard brick can be made from bauxite, magnesite and chrome ore by the use'of an aluminium sulfate solution without the addition of magnesium silicate. To make a furnace lining the aggregate is ground together with ma nesium silicate and moistened with the solution of 1 per cent. of aluminium sulfate in water or the ground magnesium silicate may be held suspended in the solution of aluminium sulfate and so mixed with the aggregate and brought to the requisite physical condition 105 either water or a solution of aluminium sulfate, being if desired added at the time of using.

What we claim is: e

1. The hereindeseribed' process, which consists in agglomerating a refractory substance before kilning by a solution of aluminium sulfate.

2. The hereindescribed process, which consists in agglomerating a refractory substance before heating by the addition of aluminium sulfate and hot water, molding this mixture in a heated mold, and then burning.

3. The hereindescri'bed process, which consists in agglomerating a mixture of silica and a magnesium silicate before kilning by 'a solution of aluminium sulfate.

4. The hereindescribed process which consists in agglomerating a refractory substance and a substance adapted to sinter at a high tem erature by the addition before heating 0 aluminium sulfate and water.

5. The hereindeseribed process, which consists in agglomerating a refractory sultstance and a material adapted to sinter at a high temperature by the addition before heating of aluminium sulfate and hot water, molding. the mixture in a heated mold and then burning.

GEORGE CANNAN FLUDDER. GEORGE ERIC FLUDDER. ALBERT WILLIAM FLUDDER.

Witnesses as to George Cannan Fludiler and George Eric Fludder:

RICE K. Evans, CHAS. N. DANIELS. Witnesses as to Albert \Villiam Flmhlcr:

F. L. RAND, H. D. JAMESON. 

